Use Plugins DSL in Kotlin Gradle scripts

When plugins DSL is used, there is no need to
manually generate typesafe accessors for extensions and
conventions (by running `./gradlew kotlinDslAccessorsSnapshot`).

libraries/examples/kotlin-jsr223-daemon-local-eval-example/build.gradle.kts

@@ -1,7 +1,9 @@
 
 description = "Sample Kotlin JSR 223 scripting jar with daemon (out-of-process) compilation and local (in-process) evaluation"
 
-apply { plugin("kotlin") }
+plugins {
+    kotlin("jvm")
+}
 
 val compilerClasspath by configurations.creating